Meinshausen Malteet al. (2009) states that Global warming is the rise in earth’s surface temperature as a result of greenhouse effect.

The greenhouse gas such as carbon-dioxide and other contaminants absorb more heat from the sun then radiate back, causing an increase in intensity of heat in the atmosphere.

Global warming affects weather, plants and creatures everywhere. Human beings warm the earth’s atmosphere by burning gases and carrying out deforestation. Fossils such as oil, coal and natural gases made from plant material remains dumped in the course of the earth’s carboniferous period. These fossils can be burned to generate energy. Yearly, the world burns at least five billion tons of fossil fuel.Carbon dioxide from burning fossil fuels enters the atmosphere and oceans absorb some and some is taken up by photosynthesized plants. (Root Terry et al. 2003)


1. Climatic changes: Global warming leads to changes in climate. The world is becoming hot. There is forecasting of regional climate variation along the ecosystem.

2. Changes in the sea level: there is rise in sea level due to the greenhouse effect. Four changes take place before this. They are; mountain glacier melting, Thermal expansion and Greenland ice sheet melting. Thus, the coastal capitals and ports may be flooded under sea-water. Many islands may disappear from the earth surface and also from the world map.

4. Human Health: Human health is exposed to risk due to Global warming. There is spread of tropical diseases brought about by a lot of warm on the earth surface, due to climatic changes.


Meinshausen, Malte, et al. “Greenhouse-gas emission targets for limiting global warming to 2 C.” Nature 458.7242 (2009): 1158.

Root, Terry L., et al. “Fingerprints of global warming on wild animals and plants.” Nature 421.6918 (2003): 57.